Malicious PDF — malware analysis report

Static analysis result for SHA-256 d598bd63b0669492…

MALICIOUS

PDF

84.2 KB Created: 2021-09-20 03:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 867f81e24c92f10526d5e8bb16e224fb SHA-1: ed765c8221934ce2e21e2083d4e1f75d5b74cafc SHA-256: d598bd63b06694925205714e1d40b2588ac22db41e33dbac4438b7279b46850e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised websites and disposable hosting, likely intended to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to lure users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/0d97124a93587811b0c0ad8279758548/85268075407.pdf In PDF document text
    • http://kemmurad.com/webroot/img/files/70184870520.pdfIn PDF document text
    • http://cesarrodarte.com/userfiles/file/filikokenojexol.pdfIn PDF document text
    • http://zenithmetals.com/files/67015551054.pdfIn PDF document text
    • http://fpempresa.cen.es/userfiles/files/mosopexixur.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/91296753453.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/4105099239.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/dinose.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/4f5c83fe322c1cfbb833e15cd974b275/93918030817.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/89655933778.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/5209293103.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/tetirowikasos.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/pegipiwadisuv.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/neson.pdfIn PDF document text
    • http://xn--80aer5aza.xn--c1acndkmcarx.xn--p1ai/ckfinder/userfiles/files/53980672032.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/20565924684.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/c8fcbbafbdccb351bed183f3d939f2c9/zanofidaduguvilavaf.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16147ace4e9e7f---75887391939.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/wawesopedajeze.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/dokowubeligexaguwo.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/10638436748.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/zonerebumebanugogakimuki.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/30894425539.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=apk+mod+gta+vice+cityPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC016 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_01_sfnt_off0000c813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC813 10692 bytes
SHA-256: 04e17ddb349bec52e0dc2707995cee076f176887c384115a24e672b35a326bf6
font_02_sfnt_off0000e07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07E 16284 bytes
SHA-256: 65dfad125546efb8f2a71f825911919546a9c7e51d723d910fc09019f6959011
font_03_sfnt_off0000f6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B3 19876 bytes
SHA-256: c1616fa8e57cb357d891f333dbbd977018ebc9e961c5d48b81356b5a6b008136
font_04_sfnt_off00012a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.